That is not an E-body shifter handle, but rather a B-body pistol grip. I cant really tell if the hole is in the right place from the picture, but from what I see it doesnt look correct. You need to jack up the car and see where the shifter mechanism is mounted to, if it is a correct E-body transmission then the tailshaft should have two mounting pads on it....if it doesnt than you have a pre-70 B-body transmission and you will need to find a 70 or later B/E-bod tailshaft or the correct transmission. If you take some pictures of the transmission from under the car, I will be able to tell you for sure......but as it stands you definately have the wrong shifter handle, possibly the wrong shifter mechanism/rods, and maybe even the wrong transmission.